refactor: getToday (#281)

src/utils/date.ts

@@ -1,10 +1,8 @@
 export const getToday = () => {
   const date = new Date();
-  const dateString =
-    date.getFullYear() +
-    '-' +
-    ('0' + (date.getMonth() + 1)).slice(-2) +
-    '-' +
-    ('0' + date.getDate()).slice(-2);
-  return dateString;
+  const year = date.getFullYear();
+  const month = String(date.getMonth() + 1).padStart(2, '0');
+  const day = String(date.getDate()).padStart(2, '0');
+
+  return `${year}-${month}-${day}`;
 };